Subzero. Changes the Register Allocator so that it is aware of register

src/IceTargetLoweringMIPS32.cpp

Index: src/IceTargetLoweringMIPS32.cpp
diff --git a/src/IceTargetLoweringMIPS32.cpp b/src/IceTargetLoweringMIPS32.cpp
index 8f434b54035e2ef208d09591bd3f6d738ca720d7..00a294ad5516fb4092957b1fdced1e6e8fa4e8cc 100644
--- a/src/IceTargetLoweringMIPS32.cpp
+++ b/src/IceTargetLoweringMIPS32.cpp
@@ -56,6 +56,8 @@ TargetMIPS32::TargetMIPS32(Cfg *Func) : TargetLowering(Func) {
   IntegerRegisters[RegMIPS32::val] = isInt;                                    \
   FloatRegisters[RegMIPS32::val] = isFP;                                       \
   VectorRegisters[RegMIPS32::val] = isFP;                                      \
+  RegisterAliases[RegMIPS32::val].resize(RegMIPS32::Reg_NUM);                  \
+  RegisterAliases[RegMIPS32::val].set(RegMIPS32::val);                         \
   ScratchRegs[RegMIPS32::val] = scratch;
   REGMIPS32_TABLE;
 #undef X